Printing-press.



Patented lulyl;, 1902.

T. :4. NORTH. PRINTING PRESS. (Application filed Dec. 22, 1897.)

3 Sheets-Sheet I (No Model.)

. LEETE Patented July 1, I902.

.S m m P "6 m T .N B P 5 6 3 0 7 w 0. N

(Application filed D60. 22. 1897J 3 Sheets-Sheet 3.

(No Model.)

UNITED STATES v PATENT OFFICE.

THOMAS M. NORTH, OF BROOKLYN, NEW YORK, ASSIGNOR, BY DIRECT AND MESNEASSIGNM-ENTS, TO ROBT. HOE AND CHARLES W. CARPENTER, OF NEW YORK, 'N. Y., UNDER THE FIRM-NAME OF'R. I-IOE -& COMPANY.

PRINTING-PRESS.

SPECIFICATION forming part of Letters Patent No. 703,665, dated July 1, 1902.

Application filed December 224 1897. Serial No. 663.003- N model.)

To all whom, it may concern:

Be it known that I, THOMAS M. NORTH, a subject of the Queen-of Great Britain, residing at Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in PrintingPresses, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to mechanism for presenting offset-sheets to and removing them from the impression-cylinder. In constructions heretofore suggested it has been proposed to mount the offset in the form of a I 5 web upon asupply-roll within the impressioncylinder and to cause it to move at intervals from a supply-roll to a take-up roll also mount-.

ed within the cylinder. This arrangement has the disadvantage of necessary complexity of mechanism in order to provide for the movement of the tympan-web, and it has the further disadvantage that inasmuch as the offset or tympan web is shifted after each impression successive impressions do not register with each other, and consequently the life of the offset-web is reduced substantially I attention more or less constantly of the operator.

In carrying out the present invention it is proposed to supply the tympan or offset sheet from a supply-roll placed upon the frame of the machine outside of .the cylinder and to to cause it to be automatically fed to the impression-cylinder and the tympan or ofiset sheets to be automatically detached from the web at intervals when required to remain upon the impression-cylinder during a 11nmber of impressions and at like intervals when soiled to be automatically released and do livered from the impression-cylinder.

In the practical embodiment of this invention any means desired may be employed for severing the tympan or offset sheet from the web, and I do not, of course, confine myself to the particularmeans. lier'einshown, which consists in the use of a perforated web and means for clamping the web so that the sheet -'thisspecification, Figure 1 is a side view of a press to which my invention has been applied,'showing the second impression-cylinder and part of the first impression-cylinder and part of the delivery-cylinder. Fig. 2 isan end viewjof the same, theline of sight being that shown by the arrow in Fig. 1 and the first impression-cylinder being removed. Fig. 3 shows the position of the grippers when about to seize the end of the tympan-web.

'Fig. 4 shows the position of the parts at the moment of the severing of the web, the end of the web from which the sheet has just been severed being shown clamped to the feed-ta ble. Fig. 5 represents the position of the grippers when the grippers of the delivery cylinders are about taking 0d a printed sheet from the impression-cylinder. Fig. 6 shows the position of thegripperswhen the grippers of the delivery-cylinders are about taking off a printed sheet,toge ther with the tympan-sheet, from the impression-cylinder; and Fig. 7. is a plan view of a controlling-lever.

The tympan or offset web A, which in the form of machine shown is preferably divided into sheets of proper length by perforations,

is mounted in brackets attached to the frame of the machine and between guide-rollers a a, from which it descends over a feed board or table B, having a hinged flap b. The cylinder is provided with the usual grippers O for the printed sheet, mounted upon ashaft O and actuated by cams (not shown) in the usual manner. For the tympan or offset sheets there is provided a second set of grippers D, fastened upon a shaft D. From the hub of these grippers are two projecting lugs between which lies a pin attached to a lever (Z, journaled upon shaft D, alongside of each gripper D. These levers are rotated by the grippers D through their lugs and the pin 011 the levers, and they carry at their ends, by projecting through holes in the same, pins (1, playing through perforations in the edge of the cylinder-shell for the purpose of lifting the edge of the tympan-sheet into reach of the grippers of the delivery-cylinder at the propertime. Theblanket-grippersare shown at F. The sheet-grippers abut against the outer surface of the cylinder and the'tympan and blanket grippers against different portions of the edge of the cylinder-shell, as shown in Fig. 6.

The shaft D carries at one end a doubleended lever f, one end of which is pressed by a spring G to close the tympan-grippers and the other end of which carries a roller f, which engages with a cam H to open the tympan-grippers. This cam II slides lengthwise of the cylinder upon two studs 7t 7t and is only moved into the path of the rollerf at those intervals in the operation of the press at which it is desired to replace the tympansheet. The cam is controlled by a rod h between two collars, on the outer end of which is the end of one arm of a bell-crank lever h, to the other arm of which is attached a connecting-rod h, joined below to a pivoted lever moved in one direction by the spring 1' and in the other by the cam J during a portion of each revolution of the cam-shaft I. The movementoccasioned bythe cam J moves the cam lI outward, and the spring 2' tends to move it inward, (into the path of rollerf;) but its action is prevented, except at stated times, by the lever K, Figs. 1 and 7, which in its normal position (shown in broken lines in Fig. 7) stands with its end just above the collar Z on the connecting-rod h', preventing it from rising. The lever K is periodically withdrawn by a mechanism which includes a pin 70, revolving with the cylinder and which at each revolution moves the wheel k one tooth. A pin it" in the same way moves a wheel k one tooth for each revolution of wheel As each of the wheels 7: and 7c have twenty teeth, the wheel k will have but one revolution to four hundred of the cylinder. The wheel 7.1 carries a cam s, which engages with a roller on lever K. It is obvious that this cam will press back the lever K against its spring K every four hundred revolutions of the cylinder, thereby relieving connectingrod h. The efiect of this is to cause the cam H to move temporarily into the path of the roller f, opening the tympan-grippers and permitting the tympan-sheet to be caught by the grippers p of the delivery-cylinder P. Ordinarily the grippers p seize only the printed sheets, as shown in Fig. 5; but when the tympan-grippers are opened they rock the levers d, which in turn force the pins d outward, lifting the edge of the tympan-sheet into the grasp of the grippers p, as shown in Fig. (5.

In front of the feed-table B is a rock-shaft M, carrying a clamping-bar m and levers '02, each of which has a pin riding in a slot of a braelcetm", attached to the table-flap b. The shaft M also carries the sheet-metal paperguides 72. The rock-shaft M is provided with arms '21, jointed to a connecting-rod 11, passing down to bell-crank lever O, actuated in one direction by the cam 0 during a part of its revolution and in the other by the spring R,(whichpressesdownward.) Thetendency of the spring R to depress the upper end of lever O is prevented from acting, usually, by the engagement of lever K with a collar 7', fixed upon the connecting-rod n". When, however, lever K is withdrawn, rod 11. desoends, rocking shaft M from its normal position (shown in Fig. 4) to the position shown in Fig. The levers m, now acting through brackets on", have pushed down the feed-table flap b close to the cylinder, and the paperguides have pressed in the edge of the tympan-sheet to a position where it can be readily grasped by the tympan-grippers. The tympan-web is now caught by the tympan-grippers and pulled forward by the revolution of. the cylinder, (the regular sheet-grippers being open at this point.) When a full tympansheet has passed onto the cylinder, the raised portion of cam 0 causes the shaft M to rock inward until the clamping-bar m descends upon the table-flap Z2 (which at the same time is forced outward by the action of levers m) and clamping the paper prevents further feed. This position is shown in Fig. 4. The continued motion of the cylinder now severs the tympan-sheet at the perforated line.

Many changes may be made in the mechanical details by which this invention is carried into effect. It is to be understood, therefore, that the invention is to be considered as generic in its nature and is not to be limited to the specific forms of mechanism set forth in the foregoing specification. Certain parts of the construction are novel in the1nselves and are capable of independent use. It is to be understood, therefore, that such use is contemplated.

WVhat I claim is- 1. The combination with a cylinder, of means for supplying an offset-web thereto, and means for separating a sheet from said Web, substantially as described.

2. The combination with a cylinder, of means for intermittently supplying an offsetweb thereto, and means for separating from said web a suflicient length to form an offsetsheet, substantially as described.

8. The combination with a cylinder, of means for intermittently supplying a perforated offset-web thereto, and means for separating from said web a suificient length to form an offset-sheet, substantially as described.

4. The combination with a cylinder, of means for supplying an olfset webthereto, means for causing the cylinder to seize the end of the web, and means acting to clamp the web in opposition to the pull of the cylinder and thus cause an offset-sheet to be separated therefrom, substantially as described.

5. The combination with a cylinder, of means for intermittently supplying an offsetweb thereto, means for causing the cylinder to'seize the end of the web, and means acting to clamp the web in opposition to the pull of the cylinder and thus cause an offset-sheet to be separated therefrom, substantially as described.

6. The combination with a cylinder, of means for supplying an offset-web thereto, means for causing said cylinder to seize the web once in a predetermined number of revolutions, and a clamping device acting to hold the web against the pull of the cylinder whereby an ofiset-sheet is separated therefrom, sub

stantially as described.

7. The combination with a cylinder having grippers, of means for intermittently supplying an oifset-web thereto, and an intermittently-operated clamping device acting to hold the web against the pull of the cylinder whereby an ofiset-sheet is separated therefrom, substantially as described.

8. The combination with a cylinder having means for seizing the end of a web, of a table, means whereby an offset-web is fed over said table, and a clamping device acting to hold the web to the table after it has been seized by the cylinder and operating in connection with the web-seizing means on the cylinder to separate an offset-sheet from the web, substantially as described.

9. The combination with a cylinder having means for seizing the end of a web, of a movable table, means whereby an offset-web is fed over said table, and a clamping device acting to hold the web to the table after it has been seized by the cylinder and operating in connection with the web-seizing means on the cylinder to separatejan offset-sheet from the web, substantially as described.

10. The combination with a cylinder, of means for supplying an offset-web thereto, means for releasing and removing from the cylinder an offset-sheet which has been used sufficiently, means for seizing the end of the offset-web, and means for separating an offset-sheet from the web, substantially as described. I

11. The combination with a cylinder, of means for supplying an ofiset-web thereto,

means for releasing and removing from the said releasing, seizing and separating mechanismi nto operation once in a predetermined number of revolutions of the cylinder, substantially as described.

12. The combination with a movable table, of a movable paper-guide located over one end of the table, and means for causing said guide todepress the end of the paper which extends beyond the table beneath the level of the table, substantially as described.

13. The combination with a cylinder having grippers, of a movable paper-feeding table, means for depressing the endof the paper which extends beyond the table into the path of the grippers on the cylinder, substantially as described.

ing grippers, of a movable paper-feeding end of the paper which extends beyond the 1 table into the path of the grippers on the cylinder, and a paper-clamping device, substantially as described. I

16. The combination with a cylinder having grippers, of va movable paper feeding table, a shaft located on one end of the table, means carried by theshaft for raising and lowering the table, a paper-guide also carried by the shaft and operating to depress the end of the paper which extends beyond the table into the path of the grippers on the cylinder, and a paper-clamping device carried by the shaft, substantially as described.

17. The combination of the regular printedsheet grippers, ofiset-sheet grippers bearing on anincline of the edge of the cylinder-shell, and pins for lifting the edge of the ofisetsheet, substantially as described.

18. The combination with a cylinder, of a set of sheet-holding grippers, a second set of grippers, and lifting devices connected to and operated by the second set of grippers, substantially as described.

19. .Thecombination with a cylinder, of a I set of grippers, a set of sheet-lifting pins, le-

and a pin extending from said levers and lying between the lugs on the grippers, substantially as described.

21. The combination with a cylinder, of devices for intermittently supplying an offsetweb thereto, means for separating from said web a suflicient length to form an oifset-sheet, and intermittently-operated means for removing from the cylinder the used offset-sheet, substantially as described.

22. The combination with a cylinder, of devices for supplying an offset-web thereto, means for separating from said web a sufficient length to form an oiTset-sheet,and means for delivering said offset-sheet together with the printed sheet, substantially as described.

23. The combination with a cylinder, of devices for intermittently supplying an offset web thereto, means for separating from said web a sufficient length to form an ofiset-sheet, and means operating once in a predetermined number of revolutions of the cylinder to deliver the ofiset-sheet together with the printed sheet, substantially as described.

24. The combination with a cylinder having grippers, of a movable cam for operating said grippers,mechanism for moving the cam, means for bringing said mechanism into operation once in a predetermined number of revolutions of the cylinder, means for feeding an oilset-web to the grippers, and a clamping device operating in connection with the grippers to separate an olfset-sheet from the web, substantially as described.

25. The combination with a cylinder having grippers, means for feeding an ofiset-web to the grippers, a clamping device operating on the web in opposition to the pull of the grippers, mechanism for operating the clamping device anda common locking device operating to simultaneously release the gripperoperating mechanism and the clamp-operating mechanism, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

THOMAS M. NORTH. Witnesses:

T. F. KEHOE,

J. A. GRAVES. 

